Satco S1820 - 30/70/100 Watt

3-Way - A21 - Frost - 2,500 Life Hours - 120 Volt

When used with a lamp equipped with a 3-way switch, 3-way light bulbs like the Satco S1820 give the option of three different light levels for different applications requiring different amounts of light. The S1820 has a frosted A21 bulb shape and medium (E26) base. It lasts 2,500 life hours and will operate using 30 watts, 70 watts, or 100 watts.